Can Cluely be detected by HackerRank?

HackerRank assessments run as a web page, and web pages live inside the browser sandbox. A page can observe its own tab: whether it has focus, whether the browser is in full screen, paste events into its editor, and timing patterns in how code appears. With the candidate's permission it can also use the webcam and, in proctored configurations, record the screen.

What a web page cannot do is enumerate the other software on the machine. It cannot list running processes, read other windows, or see a desktop overlay that renders outside the browser. That boundary is browser security, and it applies to every assessment platform, not just HackerRank.

So the question splits cleanly in two. Without proctoring, HackerRank has no direct way to see a desktop app like Cluely. With proctoring enabled, the picture changes, and the next section walks through exactly where.

You are taking a timed screen that matters, you know overlay tools exist, and you want to know what the assessment actually observes. That is a fair question, and this section answers it concretely. The short version: the overlay itself is outside the page, but proctoring watches the person and the screen, not the process list.

• Screen recording. If the proctored mode records or shares a screen, everything rendered on that screen is in the recording, an overlay included.
• Webcam monitoring. Reading an overlay produces gaze shifts and long off-camera glances that reviewers and automated checks look for.
• Focus and full-screen tracking. Switching windows or leaving full screen is exactly the signal these modes exist to record.
• Code similarity. Pasted, AI-shaped solutions can be flagged by plagiarism and similarity checks after the fact, with no live monitoring at all.

A backend engineer invited to a proctored HackerRank screen reads the assessment email, sees webcam and screen recording listed, and moves her AI use to the practice days before the test instead. The assessment goes fine, because the rehearsal reps did the work the overlay would have pretended to do.

Detection mechanics are only half of the answer; the other half is policy. A proctored assessment comes with integrity terms, and running a live answer tool inside one violates those terms regardless of whether anything notices in the moment. Flagged results can be voided, and offers have been rescinded over assessment integrity.

This is also where SubcueAI's own position is worth stating, because it is the same position we publish everywhere: proctored and recorded assessments are out of scope for live assistance, SubcueAI included. That is not a marketing hedge; it is an architectural honesty line. No overlay tool, whatever its vendor claims, is invisible to a recorded screen, a webcam, or a determined reviewer.

The detectability cluster applies this same scenario-by-scenario honesty to screen sharing, meeting platforms, and company-managed devices.

The legitimate place for AI in a HackerRank pipeline is before the timer starts. Practicing with an AI interviewer against realistic coding questions builds the recall that a proctored screen actually tests, and no consent or integrity question exists in your own rehearsal.

A concrete loop that works: run a timed mock interview on the question family the screen covers, review where your solutions stalled, and repeat until the pattern is boring. SubcueAI's mock mode generates role-specific questions and a post-session review, which is the practice half of this page's advice, automated.

For live human interviews, the calculus is different from proctored screens: those are conversations rather than monitored tests, and candidate-side assistants operate there within the honest limits this library documents. Where the line sits for each scenario is exactly what the detectability pages map out.